The invention provides an arc-shaped multi-focus fixed anode gate controlled ray source which comprises an arc-shaped ray source shell, a ray tube bracket, a plurality of fixed anode reflected ray tubes and a plurality of gate controlled switches; the fixed anode reflected ray tubes are fixed on the arc-shaped ray source shell through the ray tube bracket; focuses of the fixed anode reflected raytubes are distributed on a same distribution circle; and the gate controlled switches are correspondingly connected with the fixed anode reflected ray tubes. The arc-shaped multi-focus fixed anode gate controlled ray source provided by the invention has the benefits that by splicing a plurality of arc-shaped multi-focus fixed anode gate controlled ray sources into a global ring structure, the focuses of all the fixed anode reflected ray tubes in the multi-focus fixed anode gate controlled ray sources can be distributed on the same distribution circle; and the arc-shaped multi-focus fixed anodegate controlled ray source is simple in structure and lower in cost and can generate rays with enough strength, and a sufficient number of focuses is distributed in the peripheral direction.